Paul etienne baedokna



(No Model.)

P. E. BARDONNAUT.

MEANS FOR PREVENTING NOISE OGGASIONED BY VIBEATIONS 0E TELEGRAPH WIRES.

Patented Jan. 11, 1887 w 11 J1 E}. w m I Iii/ .4 w m 20 73 w I 1 w N. PETERS, PhnlwLllhcgripllen Washinglorl, D. C.

UNITED STATES PATENT OFFICE.

PAUL ETIENNE BARDONNAUT, OF TOULOUSE, FRANCE.

MEANS FOR PREVENTING NOlSE OCCASIONED BY VIBRATIONS OF TELEGRAPH-WIRES.

SPECIFICATION forming part of Letters Patent No. 355,753. dated January 11, 1887. Application filod July 17, 1885. Serial No. 171,874. (No model.) Patented in France January 6. 1885, No. 166,316.

To aZZ whom it may concern.-

Be it known that I, PAUL ETIENNE BARDON- NAU'r,'a citizen of the French Republic, residing at Toulouse, in the French Republic, have invented certain new and useful Improvements in Means for Preventing the Noise Occasioned by the Vibrations of Telegraph or Telephone "Wires, (for which I have obtained Letters Patent in France, No. 166,316, dated January 6, 1885,) of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

Referring to the drawings, Figures 1, 2, 3, and at show in elevation various forms of sound deadening springs interposed in the line-wire and connecting said wire with its rigid support.

It is well known that aerial conductors of electricity are subjected to Vibrations that result in more orless noise, according to the degree of vibration, which latter is due toatmospheric influences.

I have found that when a resilient mediumsuch as a coiled spring-is interposed in the electric conductor itself in close proximity to the insulators, or if said insulators are supported from a resilient medium, or if the conductor itselfis supported from such a medium, the noise inherent to or produced by the vibrations oftheconductoris effectually avoided.

The invention consists, essentially, in the interposition of a spring in the conductor or line-wire itselfof which such springthen forms a part and serves as a connection between the line-wire and its insulators or rigid supports.

In carrying out my invention Iinterpose in the line-wire a connection, A, provided with the volute portions a a, which perform the functions of springs, as shown in Figs. 1 and 2. This connection is secured to the insulator B, its ends being secured to the ends of the line-wire w by any suitable meansas, for instance, by means of muffs or sleeves m m.

In Figs. 3 and 4 the spring portions a a of the connection differin shape from those shown in the preceding figures. In Fig. 3 the springs are shown as having a spiral form, while in Fig. 4 the diameter of the spirals of the spring increases from the ends of the springs toward the center, forming double conical springs.

The sleeves or muffs m m, or connections be tween the ends of the wire and the ends of the connection A, are of the ordinary kind. By theuse of the arrangement of devices shown in Fig. 1' an additional advantage is obtained in that the wires areallowed a certain amount of contraction without any liability of break age. J I do not desire toclaim, broadly, the interposition of a spring breaking the continuity of an electric conductor and forming a resilient joint, as this has been donein underground lines for compensating the contraction and expansion in such. conductors; but I believe I am the first to use a resilient spring for counteracting the noise due to the vibrations of aerial conductors.

Having now described my invention, what I c aim is The combination, with an aerial conductor of electricity or a line-wire and its rigid support, of a resilient conductor interposed in and forming a continuation of said line-wire and'connecting the same with its rigid sup- 7: port for the purpose of deadening the sound due to the vibrations of the line-wire, as described.

In testimony that I claim the foregoing I have hereunto set myhand this 26th day of May, 1885.

PAUL ETIENNE BARDONNAUT.

Witnesses:

Boer. M. HOOPER,

LEON SOHMITTBUHL. 

